drivers/net/phy/davicom.c

   1 /*
   2  * drivers/net/phy/davicom.c
   3  *
   4  * Driver for Davicom PHYs
   5  *
   6  * Author: Andy Fleming
   7  *
   8  * Copyright (c) 2004 Freescale Semiconductor, Inc.
   9  *
  10  * This program is free software; you can redistribute  it and/or modify it
  11  * under  the terms of  the GNU General  Public License as published by the
  12  * Free Software Foundation;  either version 2 of the  License, or (at your
  13  * option) any later version.
  14  *
  15  */
  16 #include <linux/config.h>
  17 #include <linux/kernel.h>
  18 #include <linux/sched.h>
  19 #include <linux/string.h>
  20 #include <linux/errno.h>
  21 #include <linux/unistd.h>
  22 #include <linux/slab.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/init.h>
  25 #include <linux/delay.h>
  26 #include <linux/netdevice.h>
  27 #include <linux/etherdevice.h>
  28 #include <linux/skbuff.h>
  29 #include <linux/spinlock.h>
  30 #include <linux/mm.h>
  31 #include <linux/module.h>
  32 #include <linux/version.h>
  33 #include <linux/mii.h>
  34 #include <linux/ethtool.h>
  35 #include <linux/phy.h>
  36
  37 #include <asm/io.h>
  38 #include <asm/irq.h>
  39 #include <asm/uaccess.h>
  40
  41 #define MII_DM9161_SCR          0x10
  42 #define MII_DM9161_SCR_INIT     0x0610
  43
  44 /* DM9161 Interrupt Register */
  45 #define MII_DM9161_INTR 0x15
  46 #define MII_DM9161_INTR_PEND            0x8000
  47 #define MII_DM9161_INTR_DPLX_MASK       0x0800
  48 #define MII_DM9161_INTR_SPD_MASK        0x0400
  49 #define MII_DM9161_INTR_LINK_MASK       0x0200
  50 #define MII_DM9161_INTR_MASK            0x0100
  51 #define MII_DM9161_INTR_DPLX_CHANGE     0x0010
  52 #define MII_DM9161_INTR_SPD_CHANGE      0x0008
  53 #define MII_DM9161_INTR_LINK_CHANGE     0x0004
  54 #define MII_DM9161_INTR_INIT            0x0000
  55 #define MII_DM9161_INTR_STOP    \
  56 (MII_DM9161_INTR_DPLX_MASK | MII_DM9161_INTR_SPD_MASK \
  57  | MII_DM9161_INTR_LINK_MASK | MII_DM9161_INTR_MASK)
  58
  59 /* DM9161 10BT Configuration/Status */
  60 #define MII_DM9161_10BTCSR      0x12
  61 #define MII_DM9161_10BTCSR_INIT 0x7800
  62
  63 MODULE_DESCRIPTION("Davicom PHY driver");
  64 MODULE_AUTHOR("Andy Fleming");
  65 MODULE_LICENSE("GPL");
  66
  67
  68 #define DM9161_DELAY 1
  69 static int dm9161_config_intr(struct phy_device *phydev)
  70 {
  71         int temp;
  72
  73         temp = phy_read(phydev, MII_DM9161_INTR);
  74
  75         if (temp < 0)
  76                 return temp;
  77
  78         if(PHY_INTERRUPT_ENABLED == phydev->interrupts )
  79                 temp &= ~(MII_DM9161_INTR_STOP);
  80         else
  81                 temp |= MII_DM9161_INTR_STOP;
  82
  83         temp = phy_write(phydev, MII_DM9161_INTR, temp);
  84
  85         return temp;
  86 }
  87
  88 static int dm9161_config_aneg(struct phy_device *phydev)
  89 {
  90         int err;
  91
  92         /* Isolate the PHY */
  93         err = phy_write(phydev, MII_BMCR, BMCR_ISOLATE);
  94
  95         if (err < 0)
  96                 return err;
  97
  98         /* Configure the new settings */
  99         err = genphy_config_aneg(phydev);
 100
 101         if (err < 0)
 102                 return err;
 103
 104         return 0;
 105 }
 106
 107 static int dm9161_config_init(struct phy_device *phydev)
 108 {
 109         int err;
 110
 111         /* Isolate the PHY */
 112         err = phy_write(phydev, MII_BMCR, BMCR_ISOLATE);
 113
 114         if (err < 0)
 115                 return err;
 116
 117         /* Do not bypass the scrambler/descrambler */
 118         err = phy_write(phydev, MII_DM9161_SCR, MII_DM9161_SCR_INIT);
 119
 120         if (err < 0)
 121                 return err;
 122
 123         /* Clear 10BTCSR to default */
 124         err = phy_write(phydev, MII_DM9161_10BTCSR, MII_DM9161_10BTCSR_INIT);
 125
 126         if (err < 0)
 127                 return err;
 128
 129         /* Reconnect the PHY, and enable Autonegotiation */
 130         err = phy_write(phydev, MII_BMCR, BMCR_ANENABLE);
 131
 132         if (err < 0)
 133                 return err;
 134
 135         return 0;
 136 }
 137
 138 static int dm9161_ack_interrupt(struct phy_device *phydev)
 139 {
 140         int err = phy_read(phydev, MII_DM9161_INTR);
 141
 142         return (err < 0) ? err : 0;
 143 }
 144
 145 static struct phy_driver dm9161_driver = {
 146         .phy_id         = 0x0181b880,
 147         .name           = "Davicom DM9161E",
 148         .phy_id_mask    = 0x0ffffff0,
 149         .features       = PHY_BASIC_FEATURES,
 150         .config_init    = dm9161_config_init,
 151         .config_aneg    = dm9161_config_aneg,
 152         .read_status    = genphy_read_status,
 153         .driver         = { .owner = THIS_MODULE,},
 154 };
 155
 156 static struct phy_driver dm9131_driver = {
 157         .phy_id         = 0x00181b80,
 158         .name           = "Davicom DM9131",
 159         .phy_id_mask    = 0x0ffffff0,
 160         .features       = PHY_BASIC_FEATURES,
 161         .flags          = PHY_HAS_INTERRUPT,
 162         .config_aneg    = genphy_config_aneg,
 163         .read_status    = genphy_read_status,
 164         .ack_interrupt  = dm9161_ack_interrupt,
 165         .config_intr    = dm9161_config_intr,
 166         .driver         = { .owner = THIS_MODULE,},
 167 };
 168
 169 static int __init davicom_init(void)
 170 {
 171         int ret;
 172
 173         ret = phy_driver_register(&dm9161_driver);
 174         if (ret)
 175                 goto err1;
 176
 177         ret = phy_driver_register(&dm9131_driver);
 178         if (ret)
 179                 goto err2;
 180         return 0;
 181
 182  err2:
 183         phy_driver_unregister(&dm9161_driver);
 184  err1:
 185         return ret;
 186 }
 187
 188 static void __exit davicom_exit(void)
 189 {
 190         phy_driver_unregister(&dm9161_driver);
 191         phy_driver_unregister(&dm9131_driver);
 192 }
 193
 194 module_init(davicom_init);
 195 module_exit(davicom_exit);